Pickup truck bed cover

ABSTRACT

A truck bed cover for covering the bed of a pickup truck includes a plurality of rigid panel sections that extend across the truck bed and selectively supported upon bed rails that are attached to the bed sidewalls. Adjacent rigid panel sections are hingedly connected such that two or more rigid panel sections of said plurality of rigid panel sections are pivotable about axes perpendicular to the sidewalls of the bed between a closed position where the bed is covered and an open position where the bed is open. The rigid panel sections are constructed to be load bearing and provide a deck surface for carrying articles above the truck bed. Deck surface extensional panels are removably attachable to extend the deck surface beyond the sides and rear of the truck bed.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of U.S. application Ser. No. 15/406,846, filed Jan. 16, 2017.

FIELD OF THE INVENTION

The present invention relates generally to pickup truck bed covers, and more particularly, relating to a modular and loading supporting pickup truck bed cover.

BACKGROUND OF THE INVENTION

Truck bed covers are commonly used to cover the bed of a pickup truck to protect articles disposed within the bed and to improve the aesthetic appearance of the truck. Generally, there are two types of truck bed covers. The first being a soft cover that is constructed of fabric material and the second being a hard cover made of rigid material. The hard cover type may be comprised of several panels that are hinged together in a manner that allows the cover to be folded to cover and uncover the truck bed.

While the truck bed covers heretofore fulfill their respective requirements and objectives, a need remains for a new truck bed cover that is foldable, loaded supporting, and has an extendable deck surface.

SUMMARY OF THE INVENTION

The present invention provided a new truck bed cover having many advantages over existing truck bed covers. More specifically, embodiments of the truck bed cover provide a rigid, foldable load supporting deck surface for transporting articles upon the deck surface, above the truck bed. In other embodiments, the truck bed cover includes side extensional panels that provide an extended deck surface beyond the sides of the truck bed. In other embodiment, the truck bed cover further includes a rear extension panel that provides an extended deck surface beyond the rear of the truck bed.

There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated.

Numerous objects, features and advantages of the present invention will be clear to those of ordinary skill in the art upon a reading of the following detailed description of presently preferred, but nonetheless illustrative, embodiments of the present invention when taken in conjunction with the accompanying drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of descriptions and should not be regarded as limiting.

As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.

For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The following drawings illustrate by way of example and are included to provide further understanding of the invention for illustrative discussion of the embodiments of the invention. No attempt is made to show structural details of the embodiments in more detail than is necessary for a fundamental understanding of the invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice. Identical reference numerals do not necessarily indicate an identical structure. Rather, the same reference numeral may be used to indicate a similar feature of a feature with similar functionality. In the drawings:

FIG. 1 is a perspective view of a truck bed cover constructed in accordance with an embodiment of the present invention, showing the cover in a closed configuration;

FIG. 2 is a top view of the truck bed cover shown in an extended configuration;

FIG. 3A is a side view of the truck bed cover shown in an extended position;

FIG. 3B is a side view of the truck bed cover shown in a first folded position;

FIG. 3C is a side view of the truck bed cover shown in a second folded position;

FIG. 3D is a side view of the truck bed cover shown in a retracted position;

FIG. 4 is a top view of the truck bed cover with side extension panel constructed in accordance with an embodiment of the present invention;

FIG. 5A is a cross-sectional view taken along line 5 a-5 a in FIG. 4;

FIG. 5B is a cross-sectional view taken along line 5 b-5 b in FIG. 4;

FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 4;

FIG. 7 is a bottom perspective view of a side extension panel of FIG. 4;

FIG. 8 is a top view of the truck bed cover with side extension panels and a rear extension panel constructed in accordance with an alternative embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 8;

FIG. 10 is a bottom view of the side extension panels and rear extension panel of FIG. 8;

FIG. 11 is a partial cross-sectional view showing a panel section of the truck bed cover fixedly attached to the truck bed;

FIG. 12 is a partial perspective view of a coupling between an elongated member of the truck bed cover and the truck bed;

FIG. 13 is a cross-sectional view taken along line 13-13 in FIG. 12;

FIG. 14 is a perspective view of the truck bed cover with the rear most panel shown in a partially folded and disconnected from an elongated member;

FIG. 15 is a cross-sectional view taken along line 15-15 in FIG. 1; and

FIG. 16 is a perspective view of a truck bed cover constructed in accordance with a second embodiment of the present invention, showing the cover in a closed configuration;

FIG. 17 is a top view of the truck bed cover of FIG. 16 with side extension panel constructed in accordance with an embodiment of the present invention;

FIG. 18 is a perspective view of the truck bed rails of the truck bed cover of FIG. 16;

FIG. 19a is a cross-sectional view taken along line 19 a-19 a in FIG. 18;

FIG. 19b is a cross-sectional view taken along line 19 b-19 b in FIG. 18;

FIG. 20 is a perspective view of a truck bed cover constructed in accordance with a third embodiment of the present invention, showing the cover in a closed configuration;

FIG. 21 is a top view of the truck bed cover of FIG. 20 with side extension panel constructed in accordance with an embodiment of the present invention;

FIG. 22 is a perspective view of the truck bed rails of the truck bed cover of FIG. 20;

FIG. 23 is a top view of a truck bed rail of FIG. 22;

FIG. 24 is a cross-sectional view of a truck bed rail taken along line 24-24 in FIG. 22;

FIG. 25a a is a cross-sectional view taken along line 25 a-25 a in FIG. 21; and

FIG. 25b is a cross-sectional view taken along line 25 b-25 b in FIG. 21.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIGS. 1 and 2, there is representatively illustrated a load supporting, folding truck bed cover 10 according to an embodiment of the invention. Cover 10 is used with a conventional pickup truck 12 having a passenger cab 14 and a truck bed 16 having sidewalls 18 and 20, and a tailgate 22. As depicted, the cover 10 is mounted to the truck bed 16 and is positioned in an extended or closed configuration where the cargo area of the truck bed is covered. The cover 10 includes a plurality of rigid panel sections 24 a-24 e that extend across and collectively cover truck bed 16. Alternatively, the cover 10 could include fewer or more panel sections as desired.

Each panel 24 a-24 e has lateral sides and a width that extends between the lateral sides. The panels 24 a-24 e are selectively positioned on the upper edges 30 a and 30 b of the sidewalls 18 and 20, respectively, such that the width of each panel section extends across the bed 16 and across at least a portion of each upper edge of the sidewalls. In the depicted, closed configuration, each panel 24 a-24 e are supported at their opposite lateral sides upon the upper edges 30 a and 30 b of the truck bed sidewalls 18 and 20. Further, each panel 24 a-24 e is constructed to be loading supporting and, in the closed configuration, provide a load supporting deck surface 32. The deck surface 32 can be used to transport various articles, such as, for example one or more snowmobiles, as further described below.

In the depicted embodiment, panel 24 a is the forward most positioned panel and is nearest the cab 14. As further described below, panel 24 a is a stationary panel that is fixedly secured to the truck bed 16. Panel 24 b is pivotally connected to panel 24 a by a hinge system including hinges 26 a, 26 b, and 26 c. Similarly, panel 24 c is pivotally connected to panel 24 b by hinge 28 a, panel 24 d is pivotally connected to panel 24 c by hinge 28 b, and panel 24 e is pivotally connected to panel 24 d by hinge 28 c. Hinge pins 26 a, 26 b, and 26 c are configured such that their pins can be removed thereby allowing panel 24 b, along with panels 24 c-24 e, to be detached from panel 24 a and removed from the truck bed.

In FIGS. 3A through 3D , the cover 10 is shown in successive, fold positions between an extended configuration where the truck bed 16 is completely covered and an open position where the truck bed is opened and the cover is stored, in a vertical position, behind the truck cab 14. Particularly, FIG. 3A shows the cover 10 in the unfolded, extended position and completely covering the truck bed cargo area. In FIG. 3B , panel 24 e is shown folded over upon panel 24 d. In FIG. 3C, panels 24 e and 24 d are folded together over upon panel 24 b and panel 24 c providing a space between panels 24 d and 24 b to permit panel 24 e to be disposed been them. In FIG. 3D, panels 24 b-24 e are folded over panel 24 a in a vertical orientation relative to panel 24 to be disposed behind the truck cab 14.

Turning now to FIG. 4, the cover 10 includes a pair of deck extension side panels 34 a and 34 b that extend the deck surface 32 beyond the sides of the truck bed 16 to allow carrying loads that requires a greater deck surface width than what is provided by the cover panels 24 a-24 e alone. The deck extension side panels 34 a and 34 b are supported by and secured to deck extension support beams 36 a-36 d that extend outwardly from opposite sides of the main cover portion. More particularly, side panel 34 a is supported at its opposite ends by support beams 36 a and 36 c and side panel 34 b is supported at its opposite ends by support beams 36 b and 36 d.

With reference to FIG. 5A, support beams 36 a and 36 b are slidably received and supported by elongated member 38 that extends across the width of the truck bed and is supported at its opposite ends upon the upper edges 30 a and 30 b of the truck bed sidewalls 18 and 20. In the representatively illustrated embodiment, elongated member 38 is extends through panel 24 a. The elongated member 38 is tubular shaped and support beam 36 a is slidably received through a first end and support beam 36 b is slidably received through an opposite end. The position of each support beam 36 a and 36 b relative to the elongated member 38 is selectively locked by spring pins 40 a and 40 b, respectively. As further depicted, the free end of support beam 36 a is slidably received by a tubular member located at one end of extension panel 34 a and the free end of support beam 36 b is slidably received by a tubular member located at one end of extension panel 34 b. To this end, the ends of the extension panels 34 a and 34 b are supported in a cantilever manner by the support beams 34 a and 34 b, respectively.

Similarly, and with reference to FIG. 5B, support beams 36 c and 36 d are slidably received and supported by elongated member 42 that extends across the width of the truck bed and is supported at its opposite ends upon the upper edges 30 a and 30 b of the truck bed sidewalls 18 and 20. In the representatively illustrated embodiment, elongated member 42 is extends through panel 24 e. The elongated member 42 is tubular shaped and support beam 36 c is slidably received through a first end and support beam 36 c is slidably received through an opposite end. The position of each support beam 36 c and 36 e relative to the elongated member 42 is selectively locked by spring pins 40 c and 40 d, respectively. As further depicted, the free end of support beam 36 c is slidably received by a tubular member located at one end of extension panel 34 a and the free end of support beam 36 d is slidably received by a tubular member located at one end of extension panel 34 b. To this end, the ends of the extension panels 34 a and 34 b are supported in a cantilever manner by the support beams 34 c and 34 d, respectively.

Turning to FIG. 6, there is shown a partial cross-section taken through support beam 36 c and an end of extension panel 34 a. As shown, support beam 36 c is slidably received by tubular member 44 that is located at the end of extension panel 34 a. The support beam 36 c and the tubular member 44 are releasably secured together by spring pin 40 e that extends through cooperating holes formed through the support beam 36 c and the tubular member 44. While only support beam 36 c and one end of extension panel 34 a is described above and shown in FIG. 6, the arrangement is the same for each end of extensional panels 34 a and 34 b and the support beams 36 a-36 d.

In FIG. 7, there is depicted a bottom perspective view of extension panel 34 a illustrating its tubular frame construction. Extensional panel 34 b has a similar construction and does not require illustration.

With reference to FIG. 8, an alternative deck extension configuration is shown, including deck extension side panels 34 c and 34 d, and deck extension rear panel 34 e. This configuration is used when the deck surface 32 needs to be extended to the sides and rear of the main cover portion. And is particularly useful in transporting two snowmobiles or similar vehicles on the deck. Extension panels 34 c and 34 d are constructed like extension panels 34 a and 34 b, discussed above, with a few differences. For instance, extension panels 34 c and 34 d are longer to extend rearwardly beyond the end of the truck bed and are configured to support the rear panel 34 e between their rearward ends. In addition, extension panels 34 c and 34 d have elevated side edge guards 46 a and 46 b, respectively, that prevent articles from slipping off the outer side edges. It is important to note, however, that extension panels 34 a and 34 b could also have similarly arranged side edge guards.

With further reference to FIG. 9, there is shown a side cross-sectional view of extension panel 34 c mounted upon support beams 36 a and 36 c. Particularly, support beam 36 a is slidingly received by tubular member 48 located at a forward end 50 and support beam 36 c is slidingly received by tubular member 52 located toward rearward end 54. Spring pin 46 f locks support beam 36 a and tubular member 48 together and spring pin 46 g locks support beam 36 c and tubular member 50 together. The construction and engagement between extension panel 34 e and support beams 36 b and 36 d is the same and does not require illustration.

With reference to FIGS. 8 through 10, the rear extension panel 34 e is disposed between the inward facing sides of side extension panels 34 c and 34 d at a location just rearward of the rear end of the truck bed. The rear extension panel 34 e is supported and secured in place to the side extension panels 34 c and 34 d by coupling posts 56 a-56 d that extend from the sides of the rear extension panel and into the sides of the side extension panels. More particularly, in the representatively illustrated embodiment, coupling posts 56 a and 56 b extend from side 58 of the rear extension panel 34 e and are received through corresponding holes formed through the side frame member 60 of side extension panel 34 c. The coupling posts 56 a and 56 b are secured against withdrawing from the side frame member 60 by pins 62. Similarly, coupling posts 56 c and 56 d extend from side 64 of the rear extension panel 34 e and are received through corresponding holes formed through the side frame member 66 of side extension panel 34 d. The coupling posts 56 c and 56 d are secured against withdrawing from the side frame member 66 by pins 62.

With reference to FIG. 11, panel section 24 a is shown fixedly secured to the truck bed 16 by coupling 68. In the representatively illustrated embodiment, coupling 68 includes an tiedown 70 attached to the panel section 24 a and a tiedown 72 attached to the sidewall 18 of the truck bed 16, and a turnbuckle 74 connected to both tiedowns. It is to be understood that while only one side of the panel section 24 a and only sidewall 18 of the truck bed 16 is shown, the opposite side is secured in the same manner and does not require illustration.

Turning now to FIGS. 12 and 13, there is shown a perspective view of an end of elongated member 42 secured to the truck bed 16 by coupling 76. It is important to note that while only one side of coupling 76 and member 42 is illustrated, the opposite side is identically constructed. Coupling 76 operates to releasably secure the elongated member 42 to the truck bed 16. In certain aspect, discussed below, it is desirable to fold panel section 24 e while member 42 remains secured to the truck bed 16, for example when the side extension panels are in use, and access to the truck bed is desired.

In the representatively illustrated embodiment, coupling 76 includes bed brackets 78 (one secured to each side of the bed), latch bar 80, latch 82, and torsion spring 84. Each bed bracket 78 is secured to the interior side of the truck bed sidewalls and includes a pair of upstanding tabs 86 and 88 that are spaced apart and between which the elongated member 42 is removably received in downward direction. Latch bar 80 extends along the length of the elongated member and is mounted at its opposite ends by a tang 90 for rotation about its longitudinal axes, which runs parallel to the elongated member. Latch 82 is conjoined with end of the latch bar 80 and is removably received by opening 92 formed through tab 86. Latch 82 is spring biased into the locked position in the opening 92 by the torsion spring 84 that operates to rotate the latch bar 80 in a first rotational direction. The spring force provided by spring 84 can be overcome by rotating the latch bar 80 in a second rotational direction, thereby removing latch 82 from the opening 92 and unlocking the coupling 76.

With reference to FIG. 14, the cover 10 is shown with panel section 24 e detached from elongated member 42 and in a partially rotated position with member 42 securely attached to the truck bed 16 by couplings 76. In such a configuration, the panel sections may be folded or rotated into the retracted or open position to allow access to the truck bed 16 without requiring disconnecting member 42 from the truck bed. Panel section 24 e is detachably connected to the elongated member 42 by spring pin 46 h that engages a hole formed through the elongated member, as seen in FIG. 15.

Also, depicted in FIG. 15, is the coupling 76 located at the opposite end of the elongated member 42 and opposite side of the truck bed 16 from which was discussed above and shown in FIGS. 12 and 13.

Turning now to FIGS. 16-19B, there is illustrated a load supporting, folding truck bed cover 10 b that is constructed in accordance to an alternative embodiment of the invention. As shown, cover 10 b has the same construction as discussed above except for having elongated left and right bed rails 90 a and 90 b, respectively. Each bed rail includes a horizontal web 92, a vertical web 94 that extends upwardly from the outer edge of the horizontal web, and a vertical web 96 that extends downwardly from the inner edge of the horizontal web. Vertical web 94 may include a plurality of additional holes 100 used for securing various accessories to the bed rail.

The bed rails 90 a and 90 b are attached to the truck bed sidewalls 18 and 20, respectively, with the horizontal web 92 and disposed along the upper edges 30 a and 30 b of the sidewalls with the vertical web 94 extending upwardly from the sidewalls 18 and 20 and the vertical web 96 extending downwardly into the truck bed and along the respective sidewall. To this end, the bed cover panels 24 a-24 e are supported on the bed rails 90 a and 90 b, which are supported by the upper edges 30 a and 30 b.

Cover panel 24 a may be removably connected to the left and right rails 90 a and 90 b to be removed from the truck along with the remaining cover panels 24 b-24 e. Cover panel 24 a may be removably secured to the left and right rails 90 a and 90 b by a pair of spring pins (not shown), one for each rail.

Additionally, the vertical web 94 of each bed rail 90 a and 90 b includes a pair of openings 98 a and 98 b that are disposed and sized to sliding receive therethrough the 36 a-36 d, respectively, and as best seen in FIGS. 19a and 19 b.

Turning now to FIGS. 20 and 21, there is illustrated a load supporting, folding truck bed cover 10 c that is constructed in accordance to an alternative embodiment of the invention. Cover 10 c is constructed like cover 10 b described above except for having elongated left and right bed rails 102 a and 102 b and cover panels 24 a-24 e are shorter so that they do not extend across the bed sidewalls 18 and 20. Rather, cover panels 24 a-24 e only extend across the opening of the truck bed. Additionally, cover panel 24 a may be removably connected to the left and right rails 102 a and 102 b to be removed from the truck along with the remaining cover panels 24 b-24 e. Cover panel 24 a may be removably secured to the left and right rails 102 a and 102 b by a pair of spring pins (not shown), one for each rail.

With reference to FIGS. 22-24, each bed rail 102 a and 102 b includes a vertical web 104 and a tubular support member 106 that is attached to the interior side of the vertical web member and runs along the length of the vertical web member. The support member 106 includes a channel 108 that extends along the length of the member and a plurality of water drain holes 110 formed through the top side of the member that communicate with the channel so that water can be drained from the top side and into the channel and then discharged through a drain hose (not shown). A rubber seal or gasket 112 is disposed partially on the top side of the support member 106 and forms a channel between the gasket and the vertical web to direct water into the plurality of drain holes 110.

Additionally, the vertical web 104 of each bed rail 102 a and 102 b includes a pair of openings 114 a and 114 b that are disposed and sized to sliding receive therethrough the 36 a-36 d, respectively, and as best seen in FIGS. 25a and 25 b.

With reference to FIGS. 25a and 25b , the vertical web 104 is secured to each bed sidewall 18 and 20, respectively, by a plurality of bolts or screws 116 with the vertical web disposed on the interior side of the sidewall and with the support member disposed about level with top surfaces 30 a and 30 b of the sidewalls, and with a portion of the vertical web having the openings 114 a and 114 b disposed vertically above the sidewalls. Vertical web 104 may include a plurality of additional holes 116 used for securing various accessories to the bed rail.

It is should be apparent from the description that rails 102 a and 102 b are loading bearing and provide support for the cover panels 24 a-24 e. Additionally, rails 102 a and 102 b may be configured to attach to the truck bed side walls using bolts holes that already exist in the truck bed side rails.

A number of embodiments of the present invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. Accordingly, other embodiments are within the scope of the following claims. 

What is claimed is:
 1. A load supporting truck bed cover for covering a bed of a pickup truck, the bed having a front end, a rear end, and a pair of sidewalls extending between the front and rear ends, each of the sidewalls having an upper edge, the truck bed cover comprising: a first elongated bed rail attached to and extending along a length of one sidewall and a second elongated bed rail attached to and extending along a length of the other sidewall, each of said first and second elongated bed rails having a horizontal web disposed along the upper edge of the sidewall to which it is attached, a first vertical web extending upwardly from said horizontal web, a second vertical web extending downwardly from said horizontal web, and a pair of extension beam openings through said first vertical web and spaced toward opposite ends of thereof; a plurality of rigid panel sections, each having a pair of lateral sides and a width extending between said pair of lateral sides, wherein each rigid panel section of said plurality of rigid panel sections being selectively positioned on said horizontal webs of said first and second elongated bed rails such that said width of each rigid panel section extends across the bed and across at least a portion of each horizontal web; wherein adjacent rigid panel sections are hingedly connected such that two or more adjacent rigid panel sections of said plurality of rigid panel sections are pivotable about axes perpendicular to the sidewalls of the bed between a closed position where the bed is covered and an open position where the bed is open; a first elongated member having a length and opposite first and second ends, said first elongated member being selectively positioned on horizontal webs of said first and second elongated bed rails such that said length of said first elongated member extends across the bed and across at least a portion of each horizontal web; a first extension beam having a length, said first extension beam extending through one of said extension beam openings of said first elongated bed rail and slidably connected to said first elongated member and selectively positionable in extended and retracted positions relative to said first end of said first elongated member; a second extension beam having a length, said second extension beam extending through a second of said extension beam openings of said first elongated bed rail and slidably connected to said first elongated member and selectively positionable in extended and retracted positions relative to said second end of said first elongated member; a second elongated member having a length and opposite first and second ends, said second elongated member being selectively positioned on horizontal webs of said first and second elongated bed rails such that said length of said first elongated member extends across the bed and across at least a portion of each horizontal web; a third extension beam having a length, said third extension member extending through one of said extension beam openings of said second elongated bed rail and slidably connected to said second elongated member and selectively positionable in extended and retracted positions relative to said first end of said second elongated member; and a fourth extension beam having a length, said fourth extension member extending through a second of said extension beam openings of said second elongated bed rail and slidably connected to said second elongated member and selectively positionable in extended and retracted positions relative to said second end of said second elongated member.
 2. The truck bed cover of claim 1, wherein said first elongated member is tubular and said first extension beam is slidably received by said first elongated member through said first end thereof and said second extension beam is slidably received by said first elongated member through said second end thereof; and wherein said second elongated member is tubular and said third extension beam is slidably received by said second elongated member through said first end thereof and said fourth extension beam is slidably received by said second elongated member through said second end thereof.
 3. The truck bed of claim 1, further comprising: a first and second side extension panels, each having a front end and a rear end; wherein said first side extension panel being removably supported at its front end by said first extension beam and at its rear end by said third extension beam; and wherein said second side extension panel being removably supports at its front end by said second extension beam and at its rear end by said fourth extension beam.
 4. The truck bed of claim 3, further comprising: a rear extension panel, said rear extension panel being removably support at opposite sides thereof by said first and second side extension panels with said rear extension panel extending between said first and second side extension panels.
 5. The truck bed of claim 1, wherein a first rigid panel section of said plurality of rigid panel sections is disposed at the front end of the bed and is fixedly connected to the bed.
 6. A load supporting truck bed cover for covering a bed of a pickup truck, the bed having a front end, a rear end, and a pair of sidewalls extending between the front and rear ends, each of the sidewalls having an upper edge, the truck bed cover comprising: a first elongated bed rail attached to and extending along a length of one sidewall and a second elongated bed rail attached to and extending along a length of the other sidewall, each of said first and second elongated bed rails having a vertical web, a support member attached to an interior side of said vertical web and extending along a length of said vertical web, and a pair of extension beam openings through said vertical web and spaced toward opposite ends of thereof; wherein said support member of each of said first and second elongated bed rails is disposed so that a top side thereof is about even with said upper edge of the sidewall to which it is attached and said a pair of extension beam openings are disposed vertically above said upper edge of the sidewall; a plurality of rigid panel sections, each having a pair of lateral sides and a width extending between said pair of lateral sides, wherein each rigid panel section of said plurality of rigid panel sections being selectively positioned on the support members of said first and second elongated bed rails such that said width of each rigid panel section extends across the bed and across at least a portion of each said support member; wherein adjacent rigid panel sections are hingedly connected such that two or more adjacent rigid panel sections of said plurality of rigid panel sections are pivotable about axes perpendicular to the sidewalls of the bed between a closed position where the bed is covered and an open position where the bed is open; a first elongated member having a length and opposite first and second ends, said first elongated member being selectively positioned on said support members of said first and second elongated bed rails such that said length of said first elongated member extends across the bed and across at least a portion of each support member; a first extension beam having a length, said first extension beam extending through one of said extension beam openings of said first elongated bed rail and slidably connected to said first elongated member and selectively positionable in extended and retracted positions relative to said first end of said first elongated member; a second extension beam having a length, said second extension beam extending through a second of said extension beam openings of said first elongated bed rail and slidably connected to said first elongated member and selectively positionable in extended and retracted positions relative to said second end of said first elongated member; a second elongated member having a length and opposite first and second ends, said second elongated member being selectively positioned on said support members of said first and second elongated bed rails such that said length of said first elongated member extends across the bed and across at least a portion of each support member; a third extension beam having a length, said third extension member extending through one of said extension beam openings of said second elongated bed rail and slidably connected to said second elongated member and selectively positionable in extended and retracted positions relative to said first end of said second elongated member; and a fourth extension beam having a length, said fourth extension member extending through a second of said extension beam openings of said second elongated bed rail and slidably connected to said second elongated member and selectively positionable in extended and retracted positions relative to said second end of said second elongated member.
 7. The truck bed cover of claim 6, wherein said first elongated member is tubular and said first extension beam is slidably received by said first elongated member through said first end thereof and said second extension beam is slidably received by said first elongated member through said second end thereof; and wherein said second elongated member is tubular and said third extension beam is slidably received by said second elongated member through said first end thereof and said fourth extension beam is slidably received by said second elongated member through said second end thereof.
 8. The truck bed of claim 6, further comprising: a first and second side extension panels, each having a front end and a rear end; wherein said first side extension panel being removably supported at its front end by said first extension beam and at its rear end by said third extension beam; and wherein said second side extension panel being removably supports at its front end by said second extension beam and at its rear end by said fourth extension beam.
 9. The truck bed of claim 8, further comprising: a rear extension panel, said rear extension panel being removably support at opposite sides thereof by said first and second side extension panels with said rear extension panel extending between said first and second side extension panels.
 10. The truck bed of claim 6, wherein a first rigid panel section of said plurality of rigid panel sections is disposed at the front end of the bed and is fixedly connected to the bed. 